CN1425175A - Matrix display device and method - Google Patents

Matrix display device and method Download PDF

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Publication number
CN1425175A
CN1425175A CN 01808194 CN01808194A CN1425175A CN 1425175 A CN1425175 A CN 1425175A CN 01808194 CN01808194 CN 01808194 CN 01808194 A CN01808194 A CN 01808194A CN 1425175 A CN1425175 A CN 1425175A
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display
load
number
means
apparatus according
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CN 01808194
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Chinese (zh)
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A·H·M·霍特斯拉格
R·范沃登伯格
W·A·J·A·范德珀尔
H·施雷德斯
S·德克森
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皇家菲利浦电子有限公司
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2044Display of intermediate tones using dithering
    • G09G3/2051Display of intermediate tones using dithering with use of a spatial dither pattern
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2018Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2018Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2037Display of intermediate tones by time modulation using two or more time intervals using sub-frames with specific control of sub-frames corresponding to the least significant bits
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2948Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by increasing the total sustaining time with respect to other times in the frame
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202Addressing of scan or signal lines
    • G09G2310/0205Simultaneous scanning of several lines in flat panels
    • G09G2310/021Double addressing, i.e. scanning two or more lines, e.g. lines 2 and 3; 4 and 5, at a time in a first field, followed by scanning two or more lines in another combination, e.g. lines 1 and 2; 3 and 4, in a second field
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0247Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0266Reduction of sub-frame artefacts
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/16Calculation or use of calculated indices related to luminance levels in display data
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source

Abstract

本发明提供一种矩阵显示装置(10)和利用子场寻址(14)控制此装置的光输出的方法,所述方法包括确定该装置的显示负载的步骤、并且还包括以下步骤:动态地改变用来显示响应于确定(16)为比阈值低的显示负载的图像的子场数目;以及有利地至少对显示信号的最低有效位采用部分线重合和/或渐变色(22,24)。 The method of the present invention to provide a matrix display device (10) and using the sub-field addressing (14) control the light output of the device, the method comprising determining the load of the display device of the step, and further comprising the step of: dynamically for changing the display in response to determining (16) the number of sub-field image is lower than the threshold value of the display load; and advantageously at least the least significant bit of the display signal using partial line coincident and / or a gradient (22, 24).

Description

矩阵显示装置和方法 Matrix display apparatus and method

本发明涉及矩阵显示装置以及利用子场寻址和确定该装置的显示负载来控制该装置的光输出的有关方法。 This invention relates to a matrix display device and a display using the sub-field addressing and load determining means to the relevant method of controlling the light output of the device.

这种装置和方法从例如WO-A-99/30309中可知,但其缺点是光的产生水平始终受限,光输出和功率特性,特别是在低显示负载时,远不够理想。 This apparatus and method is known from WO-A-99/30309, for example, but its drawback is always limited by the level of light produced, and the optical output power characteristics, particularly at low load of the display, far from ideal. 在低显示负载时可用的灰度等级数量总是有限,这是很不利的。 In the low number of gray levels available for display when the load is always limited, it is very unfavorable.

本发明试图提供一种比已知的这类装置和方法更具有优点的矩阵显示装置和有关方法。 For the method and apparatus of the present invention seeks to provide a more advantages over known such apparatus and method for a matrix display. 具体地说,本发明试图提供一种矩阵显示装置和有关方法,它考虑到以低显示负载并且有利地在不超过支持电源的最大功率负载的情况下有增加的光输出。 More specifically, the present invention seeks to provide a matrix display apparatus and related methods, which take into account a low display load and advantageously support power without exceeding the maximum power load increase light output.

根据本发明的一个方面,提供一种上述类型的矩阵显示装置,其特征在于包括:用于确定该装置的显示负载的确定装置;以及动态地改变子场数目的控制装置,所述子场可以用来显示响应于比阈值低的所述确定的显示负载的图像。 According to one aspect of the present invention, there is provided a matrix display device of the type described above, characterized by comprising: determining means for determining the load of the display device; and dynamically changing the number of subfields control apparatus, the subfields may an image display for displaying in response to a load lower than the determined threshold.

根据本发明的另一个方面,提供一种上述类型的方法,其特征在于包括以下步骤:动态地改变子场数目的控制装置,所述子场可以用来显示响应于比阈值低的所述确定的显示负载的图像。 According to another aspect of the invention, there is provided a method of the type described above, comprising the steps of: dynamically changing the number of the subfield control means may be used to display the sub-field lower than the threshold in response to said determination display image load.

具体地说,本发明有以下优点:通过对显示负载的动态监视,可以在显示负载降到阈值以下时减少子场数目。 More specifically, the present invention has the following advantages: By monitoring the dynamic load of the display, below a threshold value to reduce the number of subfields in the display load can be reduced. 这样就减少了一个场中总的扫描周期(又称为寻址周期),所以持续周期可用的时间相应地增加了,这样即使在低显示负载时也可提供增强的亮度显示。 This reduces the total scan in one field period (also referred to as an address period), the continuous available time period correspondingly increased, so that even at low load of the display may also provide enhanced display brightness. 另一特别的优点是可将持续脉冲数目增加到适合于将显示器从持续电源提取的功率保持在接近其最大值的数目。 Another particular advantage is that the number of sustain pulses may be adapted to increase the power extracted from the continuously monitor the number of power remains near its maximum value.

权利要求2和3的特征涉及本发明的各个方面,这些方面能证明根据本发明在保持所需的灰度等级数目而同时又降低子场数目等方面的优点。 Characterized in claims 2 and 3 relate to various aspects of the invention, these aspects can demonstrate advantages while simultaneously reducing the number of subfields and the like in accordance with aspects of maintaining the desired number of gray levels of the present invention.

权利要求4中定义的特征涉及动态地确定显示负载的高效而可行的装置,而权利要求5和6的特征明确了所述动态行为并且涉及确定所选的子场数目等特别有利的特性。 Defined in claim 4, wherein the display is dynamically determined relates to efficient and feasible means of the load, and characterized in claim 5 and 6 clarified the dynamic behavior and to determine the number of the selected subfield and the like particularly advantageous properties.

权利要求9,10和11提供了对显示器能正确工作的电压范围的改进。 As claimed in claim 9, 10 and display 11 provides an improvement to work properly voltage range.

参考以下所描述的实施例,本发明的这些和其他方面将得到阐述,使其显而易见。 Reference to the embodiments described hereinafter, the present invention These and other aspects will be elucidated, it is obvious.

附图中:图1示出根据本发明的包括矩阵显示器的显示装置的方框图。 In the drawings: FIG 1 shows a block diagram of a display apparatus comprising a matrix display of the present invention.

图2示出说明当改变图1所示的显示装置的子场数目时引入的滞后的曲线图。 Hysteresis graph introduced when the number of subfields FIG. 2 shows an explanatory changed as shown in FIG. 1 when the display device.

图1是说明一种显示装置实施例的示意的方块图,该显示装置包括:包含多个发光元件的矩阵显示器;以及用于将彩色视频信号发送到发光元件的相关联的驱动装置。 Figure 1 is a schematic block diagram of a display apparatus of the embodiment embodiment, the display device comprising: a matrix display comprising a plurality of light emitting elements; and means for transmitting a video signal to a color associated with the drive means of the light emitting element.

图2是说明当改变子场数目时引入的滞后的曲线图。 FIG 2 is introduced when changing the number of subfields of the hysteresis curve.

更详细地说,图1示出矩阵显示装置10,用来接收彩色视频信号12,彩色视频信号12同时发送到子场转换器14和显示负载确定装置16。 In more detail, Figure 1 shows a matrix display device 10, 12 for receiving a color video signal, the color video signal is transmitted to the sub-field converter 12 simultaneously load determination device 14 and a display 16. 显示负载确定装置16监控并分析输入的视频信号12以便确定在矩阵显示装置10的屏幕上显示图像时会升高的显示负载。 Display load determination means 16 monitors and analyzes the input video signal so as to determine the display load 12 will rise when a display image on the screen of the display device 10 in a matrix. 子场转换器14用来在输入的视频信号12上加上子场定时模式(timingscheme)、以便将信号分为多个子场、从而获得显示图像所需的亮度。 Subfield converter 14 to the video signal input 12 coupled subfield timing mode (timingscheme), so that the signal is divided into a plurality of subfields, so as to obtain a desired display image brightness.

显示负载确定装置16发送信号给控制装置18,控制装置18再向子场转换器14和部分线重合(partial line doubling)/渐变色(dithering)应用装置20发送控制信号。 Load determining means 16 transmits the display signal to the control means 18, the control device 18 again subfield converter 14, and lines overlapped portion (partial line doubling) / gradient (the dithering) application device 20 sends a control signal. 控制装置18根据显示负载确定装置16确定的显示负载将所述控制信号发送给子场转换器14和部分线重合/渐变色应用装置20。 The control means 18 determines a display means 16 determines the load control signal is transmitted to the sub-field converter 14 and a section of the wire overlap / gradient application device 20 according to the display load. 如果确定的显示负载低于阈值,那么,控制装置18将其控制信号发送给子场转换器14和部分线重合/渐变色应用装置20。 If the determined display load is below a threshold, then the control means 18 sends its control signal to the sub-field converter 14 and a section of the wire overlap / gradient application device 20. 子场转换器14接收到所述控制信号后受到控制,以便利用减少的子场数目再现输入视频信号12;而部分线重合/渐变色应用装置20则利用接收来自子场转换器14的减少的子场数目的矩阵显示驱动器22施加部分线重合和/或渐变色。 By the subfield converter 14, after receiving the control signal, so as to reduce the number of subfields using the reproduced video signal input 12; line partially overlap / gradient using the application device 20 receives from the sub-field converter 14 to reduce the number of subfields matrix display drive section 22 applies lines coincide and / or gradient. 然后,从驱动器22输出的部分线重合和/或渐变色信号24发送到矩阵显示器26的发光元件。 Then, coincident and / or gradient signal 24 transmitted to the light emitting element 26 from the matrix display portion 22 outputs the drive line.

另外,图1示出包括显示装置10和电源104的显示装置102。 Further, FIG. 1 shows a display apparatus 102 includes a display device 10 and the power source 104.

下面进一步讨论本发明的操作。 Operation of the present invention is discussed further below.

在本发明的概念内,提出一种以低显示负载、在不超过持续电源的最大功率负荷的情况下增加光输出的方法。 Within the concept of the present invention, a method of displaying a low load, an increase in light output power without exceeding the maximum continuous power loading.

现说明如下:用D0表示与矩阵显示器中接通的单元数乘以它们的接通时间的乘积成正比的最大显示负载,所述最大显示负载发生在S0持续脉冲、亮度为L0的条件下。 Will now be described as follows: D0 represents the number of unit is switched by the display matrix display multiplied by the maximum load is proportional to the product of the on-time thereof, the maximum display duration pulse S0 load occurs, under conditions of the luminance L0. 如果实际显示负载D大于D0,则采用最大子场数目N0,不加部分线重合或渐变色(后面要讨论)。 If the actual load of the display D is larger than D0, the number of subfields using the maximum N0, coincident with or without partial line gradient (to be discussed later). 必要时,可通过减少持续脉冲S的数量、使亮度L符合公式S/L=S0/L0来限制最大负载D0,并且将从持续电源提取的功率限制在最大值。 If necessary, by reducing the number of sustain pulses S and the luminance L in line with the formula S / L = S0 / L0 to limit the maximum load D0, and continued from the extracted power supply limited to a maximum. 但是,如果实际负载D小于D0,则按照本发明、通过减少所用的子场数目的方法来减少寻址时间,以使持续脉冲数最好增加到能将从持续电源提取的功率保持在接近最大值的数量。 However, if the actual load is less than D D0, then in accordance with the present invention, by reducing the number of subfields used in a method to reduce the addressing time, so that the number of sustain pulses is preferably increased continuously from the power supply can be kept close to the maximum extraction the number of values.

将部分线重合用于最低有效位或利用渐变色或二者结合使用,减少了子场数目,同时有利地保持可用的灰度等级数。 The section of the wire coincides with the least significant bit or with a gradient, or both in combination, reduces the number of subfields, while advantageously maintaining the number of grayscale levels available.

对于其它的矩阵显示器,可利用多帧表面寻址来减少寻址时间。 For other matrix displays, multi-frame may be utilized to reduce the addressing time addressable surface. 也就是说,可以采用一种方法,在包括成组邻近线寻址的显示线的由子场驱动的矩阵显示装置上显示连续的图像帧,其中具有原始亮度值数据的图像帧或场被编码成包括一组最高有效子场和一组最低有效子场的子场。 That is, a method may be employed, successive image frames displayed on the display device comprising a display line group adjacent to the line addressed by the sub-field driven matrix, wherein an image frame or field of original luminance value data is encoded into a It includes a set of the most significant sub-fields and subfields a group of least significant sub-fields. 将共用的亮度值提供给多线组中的一个线组的各条线,并且对于各连续的帧或场、或对于显示器不同的区域和/或对于不同的子场,进行不同的成组邻近线寻址。 The common luminance values ​​supplied to the respective lines of a line group of multi-line group, and for each successive frame or field, or a different area of ​​the display and / or for different sub-fields for different groups to adjacent line addressing.

这样,对于每个连续帧以及对于显示器不同的区域,以不同的方式将邻近线分成线组,例如,在奇数帧中,在显示器的上半部显示线可分为三条一组,而在下半部二条一组,而在偶奇数帧则相反,用来减少寻址周期或寻址时间而不影响图像清晰度也不产生活动的假信号。 Thus, for each successive frame and for different display areas, in a manner different adjacent line into line group, for example, in the odd frame, the upper half of the display lines of the display can be divided into a group of three, while the lower half a set of two portions, the even and odd frame in the opposite, or the address period to reduce the addressing time without affecting the sharpness of the image is not generated glitch event. 这就可留更多的时间给持续周期。 This can leave more time for sustained periods. 因此可将一个或多个子场的共用亮度值加到一组线的所有线上。 Thus one or more common subfield luminance value can be added to a set of lines for all lines. 通过在各连续的帧中和/或在显示器不同的区域中以不同的方式进行线分组,就可获得寻址周期的进一步降低,而不损失分辨率。 By and / or in successive frames at different areas of the display line groups in different ways, to further reduce the address period can be obtained without loss of resolution.

下述实例可进一步说明本发明。 The following examples further illustrate the present invention. 首先假定在VGA显示器上最大子场数目Nmax=8个子场,则可得256个灰度等级。 First, it assumes that the maximum number on a VGA monitor subfield Nmax = 8 subfields, 256 gray levels can be obtained.

寻址等离子区显示板(PDP)需要的总时间可以表示为:T=TE+TA+TS=E×(0.1ms)+N×(1.54ms)+S×(2.7μs)式中TE表示擦除时间,TA表示寻址时间,TS表示持续时间。 Addressing plasma display panel (PDP) total time required can be expressed as: T = TE + TA + TS = E × (0.1ms) + N × (1.54ms) + S × (2.7μs) where TE indicates rub In addition to time, TA represents the addressing time, TS represents the duration.

在例如PDP的情况下,功耗与显示负载D成正比增加,显示负载D是在0和1之间的相对数,它与接通的单元数乘以接通时间的乘积成正比。 In the case of the PDP, for example, proportional to the load power consumption of the display D increases, the load D is displayed in the relative number between 0 and 1, it means the number of turns proportional to the product of multiplying the ON time. 对于完全的白色图像,显示负载D等于1,而对于完全的黑色图像,显示负载D等于0。 For a full white image, the display load D is equal to 1, and for the complete black image, the display load D is equal to 0. 在此例中假定PDP中只有持续功率P0=150W可用,并足以在显示负载D0=0.25时用S0=1000持续脉冲造成亮度L0=235cd/m2。 In this embodiment it is assumed that only the PDP P0 = 150W continuous power available, and sufficient D0 = 0.25 when the display load with S0 = 1000 sustain pulses cause luminance L0 = 235cd / m2.

再次考虑上述两种情况,即,显示负载高于D0和显示负载低于D0。 Consider again the above two cases, i.e., the display load is above the display load is less than D0 and D0. 在高显示负载时,减少持续脉冲数、使得S/L=S0/L0。 At high load of the display, reduce the number of sustain pulses, such that the S / L = S0 / L0. 这意味着最大亮度减少,根据L×(D+C)=L0×(D0+C),式中C是常数,与显示负载的偏移有关,通常在0.07左右。 This means that the maximum luminance reduction, according to L × (D + C) = L0 × (D0 + C), where C is a constant, variation of the load related to the display, typically around 0.07. 当然,应当指出,在单线寻址的情况下通常使用8个子场。 Of course, it should be noted, is generally used in the case of 8 subfields single-line addressing. 在低显示负载下,利用渐变色和/或部分线重合以便协助减少所需的寻址时间。 At low load of the display, using a gradient and / or lines overlap partially in order to help reduce the required addressing time. 这将用来增加可用的持续时间以及所加的持续脉冲数,这又为低显示负载下的高的亮度准备了条件。 This will be used to increase the available time and duration of the applied sustain pulses, which in turn prepares the conditions of high luminance at low display load. 重要的是L×(D+C)=L0×(D0+C)关系仍然成立。 It is important L × (D + C) = L0 × (D0 + C) the relationship still holds.

所需的擦除时间TE等于将被擦除的子场数目E乘以擦除一个子场所需的时间,后者大约为0.1ms/子场。 TE is equal to the time required for erasure to be erased E multiplied by the number of subfields erase time required for a subfield, which is about 0.1ms / subfields. 在当前的寻址方法中,E值=1,但为了清晰的缘故,可取其值等于子场数目,即E=NMAX。 In the current addressing method, E = 1, but for the sake of clarity, it is desirable that the value is equal to the number of subfields, i.e., E = NMAX.

N为所用的子场数目,tA为寻址一个子场所需的时间,所需的寻址时间TA=N×tA,并在表1中列出,以下假定应用部分线重合。 N is the number of subfields used, tA of the time required for addressing a subfield, the time required to address TA = N × tA, and are listed in Table 1, the following assumptions apply partial line coincide. 在表1中,N的值在5到8的范围内并且对应于单线寻址情况下寻址一个场,需要的时间tA=480行×3.2μs/行=1.54ms。 In Table 1, the value of N in the range of 5 to 8 and corresponds to the single-line addressing a case where the address field, the time required tA = 480 rows × 3.2μs / line = 1.54ms. 表2列出了计算的总寻址时间。 Table 2 lists the calculated total addressing time.

所需的持续时间TS等于所加的持续脉冲数S乘以每单个脉冲事件所需的时间,即大约2.7μs。 TS is equal to the desired duration of the applied pulse number S is multiplied by the time duration required for each individual pulse events, i.e. about 2.7μs. 表2中,对50Hz(20ms场周期)和60HzPDP工作(16.6ms场周期)时所计算的持续时间。 In Table 2, when the calculated duration of 50Hz (20ms field period) and 60HzPDP work (field period of 16.6 ms).

应当指出,此处仅列出整数结果。 It should be noted here list only integer result.

表1为降低寻址时间所需的MSB和LSB数 Table 1 MSB and the LSB to reduce the addressing time required

表2产生的持续脉冲数 Table 2 number of sustain pulses generated

在1000持续脉冲时,可以在当前的等离子显示板上产生大约235cd/m2或更高的亮度。 Pulse duration at 1000, may be displayed on the plasma current produced a luminance of about board 235cd / m2 or higher. 因此,可以期望在4259脉冲时,在50Hz下产生1000cd/m2的亮度。 Thus, it may be desirable when the 4259 pulse, a luminance 1000cd / m2 at 50Hz. 在3000脉冲时,在60Hz下700cd/m2的亮度值是现实的。 When 3000 pulses, the luminance value at 60Hz 700cd / m2 is realistic.

在此例中,为了将PDP的亮度在60Hz时增加到700cd/m2(甚至在50Hz达1000cd/m2),本发明在产生高亮度时采用了部分线重合和/或渐变色、使得产生光的功耗始终固定在一个恒定值,例如150W,而且始终可以得到256个灰度等级。 In this example, for the brightness of the PDP is increased to 60Hz 700cd / m2 (even up to 50Hz 1000cd / m2), the present invention is employed in the generation of high-luminance portion coincident lines and / or gradient, such that light power is always fixed at a constant value, for example 150W, and always 256 gradations can be obtained. 在低显示负载时,对6个LSB实行部分线重合和/或应用渐变色,而在高显示负载时,不对扫描线实行双频和/或不应用渐变色。 At low display load, partial line coincident implementation and / or application of gradient 6 the LSB, and when the display load is high, no dual scan line implementation and / or application of gradient.

进一步说明此例,如果使用6子场,可使用渐变色以给出接近8比特的等效画面。 Further description of this embodiment, if the sub-field 6, gradients may be used to give a nearly equivalent 8-bit screen. 在此例中,该方法限于6子场,以免图像质量变差。 In this embodiment, the sub-field method is limited to 6, in order to avoid deterioration of image quality.

进一步说,可以有利地对单线双频的3个MBS和线双频的3个LSB实行渐变色以获得8比特的等效画面。 Further, it is possible advantageously to the dual-line, and three lines MBS three LSB implement dual gradient to obtain an equivalent 8-bit screen.

以上说明由于D变化而可以实现每个最大的光输出L,而且可以由微处理器连续地记录显示负载。 Described above can be realized due to the change in D each maximum light output L, and the microprocessor may be continuously recorded by the display load.

如上所述,如果D大于D0,则子场数目取8,持续脉冲数按S/L=S0/L0计算,结果是一个小于S0的数S,并可有足够的持续时间。 As described above, if D is greater than D0, the number of sub-field 8 taken for the number of pulses calculated by S / L = S0 / L0, S0 result is a number less than S, and have sufficient duration. 如果D小于D0,则持续脉冲数仍按S/L=S0/L0计算,但只有在使用部分线重合以及例如较少的子场时才可实现。 If D is less than D0, the number of sustain pulses based upon the S / L = S0 / L0 calculated, but before achieved only when using partial line coinciding and, for example less subfield. 寻址周期的有效数目N可利用下式计算:N=[T-(TE+TS)]/tA式中,TS=S×2.7μs,TE是一个固定的数,而tA大约为1.54ms。 The number of valid address period N may be calculated using the formula: N = [T- (TE + TS)] / tA where, TS = S × 2.7μs, TE is a fixed number, and tA is about 1.54ms. 如果N小于5,则取此数为5,对应的持续脉冲数将根据上述关系确定。 If N is less than 5, then take this number is 5, corresponding to the number of sustain pulses determined according to the above relationship. 如果得到的数在5和8之间,则可用表2列出的数,这些数可存储在查阅表中作为参考例。 If the resulting number is between 5 and 8, the number of available listed in Table 2, these numbers may be stored as a reference example in the look-up table. 然后利用这些数显示图像。 And then use these numbers to display an image.

如果显示负载发生变化,则S和N的数也相应地变化、或利用滤波器来延迟这些整定值。 If the load is changed, the S and N, the number of changes accordingly, or to delay the use of these filter setting value. 反应时间取决于电源允许的过载量。 The reaction time depends on the power loading allowed through.

在高显示负载时持续脉冲数的减少导致空闲时间,在此空闲时间,发光元件不接收任何驱动。 It leads to reduction in the number of sustain pulses at a high idle time display load, this idle time, the light emitting element does not receive any drive. 如果此空闲时间出现在子场的持续脉冲和这些持续脉冲之后的擦除脉冲之间,则由于起动(priming)粒子的损失取决于这种空闲时间,所以擦除时的放电就会有波动,结果降低了发光元件能正确工作的电压。 If this idle time occurs between the sustain pulses following an erase pulse in the subfield and the sustain pulses, the loss of particles due to start (priming) depending on this idle time, so erase discharge will fluctuate, voltage of the light emitting element results in reduced work correctly. 把空闲时间定位在擦除脉冲之后此问题就可减轻,但在这种情况下,所述起动(priming)仍受空闲时间的影响,导致所述电压范围仍有一些下降。 After the idle time targeting erase pulse can alleviate this problem, but in this case, the starter (priming) still under the influence of idle time, resulting in a voltage drop still some range.

最好的解决方案是把空闲时间定位在子场中第一部分持续脉冲和第二部分持续脉冲之间,从而避免了在最后的持续脉冲和开始擦除的下一阶段之间的空闲时间。 The best solution is the idle time is positioned between a first subfield sustain pulse portion and a second portion sustain pulses, thus avoiding the idle time between the last sustain pulse and the beginning of the next phase of erasing.

在使用重复的子场的情况下,空闲时间应定位在具有同等权重的两个子场之间。 In the case of duplicate subfield, the idle time should be positioned between two subfields have the same weight.

空闲时间可以定位在一帧的最后的子场中,也可在任何子场,或分离到许多子场中。 Idle time can be positioned at the last sub-field of one frame, it may be in any sub-field, or separated into many subfields.

由于在改变子场的数目时引入滞后,所以可以减少诸如例如闪烁的假信号。 Since the introduction of hysteresis at the time of changing the number of subfields, such as, for example, flicker can be reduced spurious signals. 如果随后显示的图像的显示负载在子场数目N改变的值附近变化的话,就会发生这种闪烁。 If the load on the image is then displayed, then, a change occurs in the vicinity of the N number of subfields change value such flicker. 图2示出这种滞后:当图像的显示负载大于D8H时,所用的子场数目N为8。 FIG 2 shows such a hysteresis: when the load of the display image is greater than D8H, the number of subfields used to 8 N. 当下一个图像的显示负载低于D8H时,子场数目N降为7。 When the next image is lower than a display load D8H, N the number of subfields is reduced to 7. 如果再下一个图像的显示负载高于D8H时,子场数目N再次增加到8。 If the load and then displaying a next image is higher than D8H, the number N of subfields increased again to 8.

滞后的提供可以结合到控制装置18中。 The hysteresis may be incorporated to provide a control device 18. 由上述可得出结论,即,在子场数目变化之后,下一个图像其显示负载至少必须改变(D8H-D8L),然后子场数目N再发生改变。 It can be concluded from the above, i.e., after the change in the number of subfields, an image showing a next load change must be at least (D8H-D8L), then the number N of subfields change again. (D8H-D8L)的典型值大约为0.02。 (D8H-D8L) a typical value of approximately 0.02.

根据上文,应当指出,本发明有利地涉及在最大子场数目量(即,目前对VGA显示器为8)情况下的单扫描。 From the above, it should be noted that the invention advantageously relates to the number of the largest sub-field (i.e., the current display is a VGA 8) in the case of single scan. 这可将亮度限制在低值,但对高显示负载已足够。 This may be limited to low brightness, the display load but high enough. 但一旦负载减小,就采用部分线重合和/或渐变色,这样仍能给出等效8子场的显示,但寻址时间却较少。 Once the load is reduced but, on the use of partial line coincident and / or gradients, so that still gives the equivalent display 8 subfields, the addressing time is less. 于是持续时间就可增加。 So the duration can be increased. 这样总可实现256灰度等级,同时,例如可以利用活动补偿来消除活动的假信号。 So the total 256 gradations can be realized, while, for example, using motion compensation to eliminate glitches activity.

应当指出,本发明适用于诸如等离子显示板以及数字反射镜装置等多种矩阵显示装置。 It should be noted that the present invention is applicable to a variety of matrices, such as plasma display panel apparatus and a digital display device such as a mirror.

因此本发明有利地考虑到低显示负载值下的改善的光输出。 Thus the present invention advantageously takes into account the improved light output at low display load value. 如上所述,本发明除了其他矩阵显示器外特别适用于PDP。 As described above, according to the present invention, in addition to the other matrix display is particularly suitable for PDP.

应当指出,上述实施例仅是说明本发明,而不是限制本发明,本专业的技术人员能够设计许多不同的实施例而不背离本发明的精神和范围。 It should be noted that the above-described embodiments are merely illustrative of the invention rather than limit the invention, those skilled in the art will be able to devise many different embodiments without departing from the spirit and scope of the invention. 在权利要求书中,括弧内的参考符号不应视为对本发明的限制。 In the claims the book, reference symbols in parentheses shall not be construed as limiting the present invention. “包括”一词不排除存在有未列在权利要求中的元件和步骤。 "Comprising" does not exclude the presence in the claims listed elements or steps. 在元件前的量词“一个”不排除存在有多个此种元件。 Preceding an element of the quantifier "an" does not exclude the presence of a plurality of such elements. 本发明可用包括数个不同元件的硬件以及适当编程的电脑来实现。 The present invention can be hardware comprising several distinct elements, and to achieve a suitably programmed computer. 在列举了数种装置的装置权利要求中,数种这些装置可以由同一硬件来实现。 Several apparatus recited in the claims means, several of these means may be implemented by the same hardware. 在各不相同的权利要求中复述某些措施的事实并不表明不能有利地利用这些措施的组合。 That certain measures are repeated in different claims it does not indicate that a combination of these measures can not be used to advantage in.

Claims (15)

  1. 1.一种矩阵显示装置(10),它包括多个发光元件(26)和安排来对所述发光元件(26)进行子场寻址的驱动器(14,22),其特征在于还包括:用于确定所述装置的显示负载的确定装置(16);以及用于动态地改变子场数目的控制装置(18),所述子场可用来显示响应于所述确定的比阈值低的显示负载的图像。 A matrix display device (10) comprising a plurality of light emitting elements (26) and arranged to drive the sub-field addressing (14, 22) of said light emitting element (26), characterized by further comprising: determining means for determining a load of said display means (16); and lower than a threshold determined in response to the display for dynamically changing the number of subfields control means (18), can be used to display the subfield image load.
  2. 2.如权利要求1所述的装置,其特征在于:驱动器(14,22),它包括子场转换器(14)和连接到所述子场转换器(14)的矩阵显示驱动器(22);所述子场转换器(14)和所述确定装置(16)两者接收输入的视频信号(12);所述确定装置(16)包括用于向所述控制装置(18)提供关于所述显示负载的信息的装置;所述控制装置(18)连接到所述子场转换器(14)、以便动态地改变用来显示所述图像的子场数目;以及所述矩阵显示驱动器(22)连接到所述发光元件(26)。 2. The apparatus according to claim 1, wherein: the driver (14, 22), which comprises a subfield converter (14) connected to the subfield converter (14) of the matrix display driver (22) ; the subfield converter (14) and said determining means (16) both the video signal (12) receiving an input; said determining means (16) comprises means for providing said control means (18) about the means loads said display information; said control means (18) coupled to the subfield converter (14), in order to dynamically change the number of subfields for displaying the image; and a display driver matrix (22 ) is connected to the light emitting element (26).
  3. 3.如权利要求2所述的装置,其特征在于还包括装置(20),它用以应用部分线重合(pritial line doubling)并连接到所述控制装置(18)、以便接收有关所述显示负载的信息、并且连接到所述矩阵显示驱动器(22)、以便对所述确定为低于阈值的显示负载作出响应而应用部分线重合。 3. The apparatus according to claim 2, characterized by further comprising means (20), which coincides with the line for application part (pritial line doubling) and connected to said control means (18) for receiving said related display load information, and connected to the matrix display driver (22), in response to the display load is below a threshold determination and the application of the partial line coincide.
  4. 4.如权利要求2所述的装置,其特征在于还包括装置(20),它用以应用渐变色(dithering)并连接到所述控制装置(18)、以便接收有关所述显示负载的信息、并且连接到所述矩阵显示驱动器(22)、以便对所述确定为低于阈值的显示负载作出响应而应用渐变色。 4. The apparatus according to claim 2, characterized by further comprising means (20), which apply to the gradient (the dithering) and connected to the control means (18) for receiving the display information about the load , and connected to the matrix display driver (22), responsive to said determination in order to show the load is below the threshold applied gradient.
  5. 5.如权利要求1所述的装置,其特征在于还包括装置(20),用于对确定为低于阈值的所述显示负载作出响应而应用部分线重合。 5. The apparatus according to claim 1, characterized by further comprising means (20) for determining said load is below a threshold responsive to the displayed line coincides with the application part.
  6. 6.如权利要求1的装置,其特征在于还包括装置(20),用于对确定为低于阈值的所述显示负载作出响应而应用渐变色。 6. The apparatus as claimed in claim 1, characterized by further comprising means (20) for determining said display load is below a threshold while the application in response gradient.
  7. 7.如权利要求1所述的装置,其特征在于:所述确定装置(16)包括用于连续地监视所述显示负载的处理装置。 7. The apparatus according to claim 1, wherein: said determining means (16) comprises means for continuously monitoring the processing load of the display.
  8. 8.如权利要求1所述的装置,其特征在于:所述控制装置(18)按照关系式S/L=S0×L0工作,式中,S0和L0是发生最大显示负载时的最大持续脉冲数和最大亮度,而S和L是当所述显示负载被确定为低于阈值时的持续脉冲数和亮度。 8. The apparatus according to claim 1, wherein: said control means (18) according to the relationship S / L = S0 × L0 work, wherein, L0 and S0 is the maximum pulse duration at maximum display load occurs number and the maximum brightness, and L is S when the display load is determined as the number of sustain pulses and the brightness is below a threshold.
  9. 9.如权利要求8所述的装置,其特征在于:由其数目低于所述最大持续脉冲数的持续脉冲引起的空闲时间出现在位于所述持续脉冲后面的擦除脉冲之后。 9. The apparatus according to claim 8, wherein: the number of its pulse duration is less than said maximum number of sustain pulses due to idle time occurs after said erase pulse is located behind the sustain pulses.
  10. 10.如权利要求8所述的装置,其特征在于:由其数目低于所述最大持续脉冲数的持续脉冲引起的空闲时间出现在子场的第一部分持续脉冲和第二部分持续脉冲之间。 10. The apparatus according to claim 8, wherein: the number of its pulse duration is less than said maximum number of sustain pulses due to idle time occurs between the first portion of the sustain pulses subfield sustain pulses and a second portion .
  11. 11.如权利要求10所述的装置,其特征在于:存在复制的子场并且所述空闲时间分离在具有同等权重的各子场之间。 11. The apparatus according to claim 10, wherein: the presence and the copy subfield idle time separation between the sub-fields have the same weight.
  12. 12.如权利要求1所述的装置,其特征在于:所述控制装置(18)按照关系式L×(D+C)=L0×(D0+C)工作,其中,L和L0代表显示负载低于阈值时和最大显示负载时的亮度值,C是大约为0.07的常数,而D和D0代表显示负载低于阈值时和最大显示负载时的显示负载值。 12. The apparatus according to claim 1, wherein: said control means (18) work in accordance with the relationship L × (D + C) = L0 × (D0 + C), where, L and L0 denotes a display load below a threshold value and brightness value of the maximum display load, C is a constant of about 0.07, and a D0 and D display representative of the load value when the load is below a threshold value and the maximum display load.
  13. 13.如权利要求1所述的装置,其特征在于:所述控制装置(18)被安排来引入滞后,其方法是:在较高的显示负载值时(与子场数目减少到增加子场数目之前的子场数目时的显示负载相比)增加子场数目。 13. The apparatus according to claim 1, wherein: said control means (18) is arranged to introduce hysteresis, which is: the higher the value of the display load decrease (increase in the number of subfields of subfields compared to the number of the display load before the number of subfields) increasing the number of subfields.
  14. 14.一种控制矩阵显示装置的光输出的方法,它利用子场寻址并且包括确定所述装置的显示负载的步骤,其特征在于还包括以下步骤:动态地改变子场数目,所述子场可以用来显示响应于被确定为比阈值低的所述显示负载的图像。 The method of the optical output of the device 14. A control matrix display, which utilizes the sub-field addressing and the step of displaying said load determining means comprises, characterized by further comprising the step of: dynamically changing the number of sub-fields, said sub- field may be used to display the response to the image is determined to be lower than the threshold value of the display load.
  15. 15.一种显示装置(102),用来接收视频信号(12)并处理所述信号以显示由所述信号确定的图像,所述图像确定所述装置内的显示负载,所述装置具有用于接收与所述显示负载有关的功率的装置(104)、并且具有如权利要求1所述的矩阵显示装置。 15. A display device (102) for receiving a video signal (12) and processing said signals to display images determined by said signal, the display image determination means within said loading, said apparatus having a related to the received power to a load device (104) of said display, and said matrix having a device as claimed in claim 1 display.
CN 01808194 2000-12-20 2001-12-11 Matrix display device and method CN1425175A (en)

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